On Mon, Sep 06, 2010 at 07:47:20PM -0400, Chet Ramey wrote:
> On 9/5/10 5:36 AM, Pierre Gaston wrote:
> > using the following:
> >
> > false; : | echo $?
> >
> > bash and ksh93 print 0
> > pdksh, dash and zsh print 1
>
> It looks like bash and ksh93 wait for each command in a pipeline to finish
> and allow the intermediate commands to set $?, which, depending on timing,
> can be seen by subsequent commands in the pipeline. The other shells must
> do something different.
Just as another data point, ksh88 (as shipped on HP-UX 10.20 as 'ksh')
prints 0. ('sh' does too, but 'sh' on that system is mostly ksh88 also.)
